llvm-6502/test/CodeGen/AArch64/arm64-misched-basic-A57.ll
David Blaikie 198d8baafb [opaque pointer type] Add textual IR support for explicit type parameter to getelementptr instruction
One of several parallel first steps to remove the target type of pointers,
replacing them with a single opaque pointer type.

This adds an explicit type parameter to the gep instruction so that when the
first parameter becomes an opaque pointer type, the type to gep through is
still available to the instructions.

* This doesn't modify gep operators, only instructions (operators will be
  handled separately)

* Textual IR changes only. Bitcode (including upgrade) and changing the
  in-memory representation will be in separate changes.

* geps of vectors are transformed as:
    getelementptr <4 x float*> %x, ...
  ->getelementptr float, <4 x float*> %x, ...
  Then, once the opaque pointer type is introduced, this will ultimately look
  like:
    getelementptr float, <4 x ptr> %x
  with the unambiguous interpretation that it is a vector of pointers to float.

* address spaces remain on the pointer, not the type:
    getelementptr float addrspace(1)* %x
  ->getelementptr float, float addrspace(1)* %x
  Then, eventually:
    getelementptr float, ptr addrspace(1) %x

Importantly, the massive amount of test case churn has been automated by
same crappy python code. I had to manually update a few test cases that
wouldn't fit the script's model (r228970,r229196,r229197,r229198). The
python script just massages stdin and writes the result to stdout, I
then wrapped that in a shell script to handle replacing files, then
using the usual find+xargs to migrate all the files.

update.py:
import fileinput
import sys
import re

ibrep = re.compile(r"(^.*?[^%\w]getelementptr inbounds )(((?:<\d* x )?)(.*?)(| addrspace\(\d\)) *\*(|>)(?:$| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$))")
normrep = re.compile(       r"(^.*?[^%\w]getelementptr )(((?:<\d* x )?)(.*?)(| addrspace\(\d\)) *\*(|>)(?:$| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$))")

def conv(match, line):
  if not match:
    return line
  line = match.groups()[0]
  if len(match.groups()[5]) == 0:
    line += match.groups()[2]
  line += match.groups()[3]
  line += ", "
  line += match.groups()[1]
  line += "\n"
  return line

for line in sys.stdin:
  if line.find("getelementptr ") == line.find("getelementptr inbounds"):
    if line.find("getelementptr inbounds") != line.find("getelementptr inbounds ("):
      line = conv(re.match(ibrep, line), line)
  elif line.find("getelementptr ") != line.find("getelementptr ("):
    line = conv(re.match(normrep, line), line)
  sys.stdout.write(line)

apply.sh:
for name in "$@"
do
  python3 `dirname "$0"`/update.py < "$name" > "$name.tmp" && mv "$name.tmp" "$name"
  rm -f "$name.tmp"
done

The actual commands:
From llvm/src:
find test/ -name *.ll | xargs ./apply.sh
From llvm/src/tools/clang:
find test/ -name *.mm -o -name *.m -o -name *.cpp -o -name *.c | xargs -I '{}' ../../apply.sh "{}"
From llvm/src/tools/polly:
find test/ -name *.ll | xargs ./apply.sh

After that, check-all (with llvm, clang, clang-tools-extra, lld,
compiler-rt, and polly all checked out).

The extra 'rm' in the apply.sh script is due to a few files in clang's test
suite using interesting unicode stuff that my python script was throwing
exceptions on. None of those files needed to be migrated, so it seemed
sufficient to ignore those cases.

Reviewers: rafael, dexonsmith, grosser

Differential Revision: http://reviews.llvm.org/D7636

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230786 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-27 19:29:02 +00:00

113 lines
3.9 KiB
LLVM

; REQUIRES: asserts
;
; The Cortext-A57 machine model will avoid scheduling load instructions in
; succession because loads on the A57 have a latency of 4 cycles and they all
; issue to the same pipeline. Instead, it will move other instructions between
; the loads to avoid unnecessary stalls. The generic machine model schedules 4
; loads consecutively for this case and will cause stalls.
;
; RUN: llc < %s -mtriple=arm64-linux-gnu -mcpu=cortex-a57 -enable-misched -verify-misched -debug-only=misched -o - 2>&1 > /dev/null | FileCheck %s
; CHECK: ********** MI Scheduling **********
; CHECK: main:BB#2
; CHECK LDR
; CHECK Latency : 4
; CHECK: *** Final schedule for BB#2 ***
; CHECK: LDR
; CHECK: LDR
; CHECK-NOT: LDR
; CHECK: {{.*}}
; CHECK: ********** MI Scheduling **********
@main.x = private unnamed_addr constant [8 x i32] [i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1], align 4
@main.y = private unnamed_addr constant [8 x i32] [i32 2, i32 2, i32 2, i32 2, i32 2, i32 2, i32 2, i32 2], align 4
; Function Attrs: nounwind
define i32 @main() #0 {
entry:
%retval = alloca i32, align 4
%x = alloca [8 x i32], align 4
%y = alloca [8 x i32], align 4
%i = alloca i32, align 4
%xx = alloca i32, align 4
%yy = alloca i32, align 4
store i32 0, i32* %retval
%0 = bitcast [8 x i32]* %x to i8*
call void @llvm.memcpy.p0i8.p0i8.i64(i8* %0, i8* bitcast ([8 x i32]* @main.x to i8*), i64 32, i32 4, i1 false)
%1 = bitcast [8 x i32]* %y to i8*
call void @llvm.memcpy.p0i8.p0i8.i64(i8* %1, i8* bitcast ([8 x i32]* @main.y to i8*), i64 32, i32 4, i1 false)
store i32 0, i32* %xx, align 4
store i32 0, i32* %yy, align 4
store i32 0, i32* %i, align 4
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%2 = load i32* %i, align 4
%cmp = icmp slt i32 %2, 8
br i1 %cmp, label %for.body, label %for.end
for.body: ; preds = %for.cond
%3 = load i32* %yy, align 4
%4 = load i32* %i, align 4
%idxprom = sext i32 %4 to i64
%arrayidx = getelementptr inbounds [8 x i32], [8 x i32]* %x, i32 0, i64 %idxprom
%5 = load i32* %arrayidx, align 4
%add = add nsw i32 %5, 1
store i32 %add, i32* %xx, align 4
%6 = load i32* %xx, align 4
%add1 = add nsw i32 %6, 12
store i32 %add1, i32* %xx, align 4
%7 = load i32* %xx, align 4
%add2 = add nsw i32 %7, 23
store i32 %add2, i32* %xx, align 4
%8 = load i32* %xx, align 4
%add3 = add nsw i32 %8, 34
store i32 %add3, i32* %xx, align 4
%9 = load i32* %i, align 4
%idxprom4 = sext i32 %9 to i64
%arrayidx5 = getelementptr inbounds [8 x i32], [8 x i32]* %y, i32 0, i64 %idxprom4
%10 = load i32* %arrayidx5, align 4
%add4 = add nsw i32 %9, %add
%add5 = add nsw i32 %10, %add1
%add6 = add nsw i32 %add4, %add5
%add7 = add nsw i32 %9, %add3
%add8 = add nsw i32 %10, %add4
%add9 = add nsw i32 %add7, %add8
%add10 = add nsw i32 %9, %add6
%add11 = add nsw i32 %10, %add7
%add12 = add nsw i32 %add10, %add11
%add13 = add nsw i32 %9, %add9
%add14 = add nsw i32 %10, %add10
%add15 = add nsw i32 %add13, %add14
store i32 %add15, i32* %xx, align 4
%div = sdiv i32 %4, %5
store i32 %div, i32* %yy, align 4
br label %for.inc
for.inc: ; preds = %for.body
%11 = load i32* %i, align 4
%inc = add nsw i32 %11, 1
store i32 %inc, i32* %i, align 4
br label %for.cond
for.end: ; preds = %for.cond
%12 = load i32* %xx, align 4
%13 = load i32* %yy, align 4
%add67 = add nsw i32 %12, %13
ret i32 %add67
}
; Function Attrs: nounwind
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture readonly, i64, i32, i1) #1
attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nounwind }